Reference PDCCH determination method, device, equipment and readable storage medium

Abstract

An embodiment of the present application provides a method, apparatus, device and readable storage medium for determining a reference PDCCH, the method comprising: detecting multiple PDCCHs; based on one or more of the reception time of the PDCCH, the ID of the Search Space corresponding to the PDCCH, and the ID of the CORESET corresponding to the PDCCH, taking one of the multiple PDCCHs as a reference PDCCH.

Description

Technical Field

[0001] The embodiments of the present application relate to the field of communication technology, and specifically to a method, apparatus, device and readable storage medium for determining a reference physical downlink control channel (PDCCH). Background Art

[0002] For the multi-transmitting receiving point (TRP) (Multi-TRP) ultra-reliable low latency communication (URLLC) scenario, if two TRPs each send PDCCH to the same user, the downlink control information (DCI) they carry is the same, and the indicated slot offset is also the same, but the terminal receives the two PDCCHs at different times, then how the UE determines the reference PDCCH is an urgent problem to be solved. Summary of the invention

[0003] The embodiments of the present application provide a method, apparatus, device and readable storage medium for determining a reference PDCCH to solve the problem of how to determine the reference PDCCH.

[0004] In a first aspect, a method for determining a reference PDCCH is provided, which is applied to a terminal and includes:

[0005] Detect multiple PDCCHs;

[0006] According to one or more of the reception time of the PDCCH, the ID of the Search Space corresponding to the PDCCH candidate, and the ID of the CORESET corresponding to the PDCCH, one of the multiple PDCCHs is used as a reference PDCCH.

[0007] Optionally, the step of taking one of the multiple PDCCHs as a reference PDCCH according to one or more of a reception time of the PDCCH, an ID of a Search Space corresponding to the PDCCH, and an ID of a CORESET corresponding to the PDCCH includes:

[0008] Using a first PDCCH among the multiple PDCCHs as a reference PDCCH;

[0009] The first PDCCH satisfies one or more of the following conditions:

[0010] The ID of the Search Space corresponding to the first PDCCH is greater than or less than the ID of the Search Space corresponding to the second PDCCH;

[0011] The ID of the CORESET corresponding to the first PDCCH is greater than or less than the ID of the CORESET corresponding to the second PDCCH;

[0012] The reception time of the first symbol of the first PDCCH is before or after the reception time of the first symbol of the second PDCCH;

[0013] The second PDCCH candidate is another PDCCH among the multiple PDCCHs except the second PDCCH.

[0014] Optionally, the multiple PDCCHs are used to schedule the same one or more of PDSCH, PUSCH, CSI-RS and SRS.

[0015] Optionally, when the ID of the Search Space corresponding to the first PDCCH is greater than or smaller than the ID of the Search Space corresponding to the second PDCCH, or the ID of the CORESET corresponding to the first PDCCH is greater than or smaller than the ID of the CORESET corresponding to the second PDCCH, the sending time of the first symbol of the first PDCCH is earlier or later than the sending time of the first symbol of the second PDCCH.

[0016] Optionally, the method further comprises:

[0017] Taking the reception time of the first symbol of the reference PDCCH as the reference time;

[0018] or,

[0019] Taking the reception time of the first symbol of the second PDCCH and the sum or difference of the transmission time intervals of the multiple PDCCHs as the reference time;

[0020] Wherein, when multiple PDCCHs schedule the same PDSCH, PUSCH, CSI-RS or SRS, the reference time and the corresponding transmission time interval of the PDSCH, PUSCH, CSI-RS or SRS are used as the first time offset;

[0021] Alternatively, in the case where multiple PDCCHs schedule the same PDSCH or CSI-RS, the time interval between the reference time and the corresponding PDSCH or CSI-RS is used as the second time offset, and the size relationship between the second time offset and the threshold is used to determine the QCL relationship of the PDSCH or CSI-RS;

[0022] Alternatively, when multiple PDCCHs schedule the same PDSCH or PUSCH, the reference time is used as the reception time of the PDCCH that schedules the PDSCH or PUSCH.

[0023] Optionally, when multiple PDCCHs schedule the same PDSCH or PUSCH, the last symbol of the reference PDCCH is used as the last symbol of the multiple PDCCHs.

[0024] Optionally, a time starting point of the first time offset or the second time offset is equal to a reception time of the reference PDCCH;

[0025] or,

[0026] A time starting point of the first time offset or the second time offset is equal to a sum or difference between a reception time of the reference PDCCH and a transmission time interval of the plurality of PDCCHs.

[0027] Optionally, the transmission time intervals of the multiple PDCCHs are explicitly or implicitly indicated through RRC signaling;

[0028] or,

[0029] The transmission time intervals of the multiple PDCCHs are indicated by DCI.

[0030] In a second aspect, a device for determining a reference PDCCH is provided, which is applied to a terminal and includes:

[0031] A detection module, used for detecting multiple PDCCHs;

[0032] The determination module is used to use one PDCCH among the multiple PDCCHs as a reference PDCCH according to one or more of the reception time of the PDCCH, the ID of the Search Space corresponding to the PDCCH, and the ID of the CORESET corresponding to the PDCCH.

[0033] Optionally, the determining module is further used to: use a first PDCCH among the multiple PDCCHs as a reference PDCCH;

[0034] The first PDCCH satisfies one or more of the following conditions:

[0035] The ID of the Search Space corresponding to the first PDCCH is greater than or less than the ID of the Search Space corresponding to the second PDCCH;

[0036] The ID of the CORESET corresponding to the first PDCCH is greater than or less than the ID of the CORESET corresponding to the second PDCCH;

[0037] The reception time of the first symbol of the first PDCCH is before or after the reception time of the first symbol of the second PDCCH;

[0038] The second PDCCH is another PDCCH among the multiple PDCCHs except the second PDCCH.

[0039] Optionally, the multiple PDCCHs are used to schedule the same one or more of PDSCH, PUSCH, CSI-RS and SRS.

[0040] Optionally, when the ID of the Search Space corresponding to the first PDCCH is greater than or smaller than the ID of the Search Space corresponding to the second PDCCH, or the ID of the CORESET corresponding to the first PDCCH is greater than or smaller than the ID of the CORESET corresponding to the second PDCCH, the sending time of the first symbol of the first PDCCH is earlier or later than the sending time of the first symbol of the second PDCCH.

[0041] Optionally, the determination module is further configured to: use the reception time of the first symbol of the reference PDCCH as the reference time; or use the reception time of the first symbol of the second PDCCH and the sum or difference of the transmission time intervals of the multiple PDCCHs as the reference time;

[0042] Wherein, when multiple PDCCHs schedule the same PDSCH, PUSCH, CSI-RS or SRS, the reference time and the corresponding transmission time interval of the PDSCH, PUSCH, CSI-RS or SRS are used as the first time offset;

[0043] Alternatively, in the case where multiple PDCCHs schedule the same PDSCH or CSI-RS, the time interval between the reference time and the corresponding PDSCH or CSI-RS is used as the second time offset, and the size relationship between the second time offset and the threshold is used to determine the QCL relationship of the PDSCH or CSI-RS;

[0044] Alternatively, when multiple PDCCHs schedule the same PDSCH or PUSCH, the reference time is used as the reception time of the PDCCH that schedules the PDSCH or PUSCH.

[0045] Optionally, when multiple PDCCHs schedule the same PDSCH or PUSCH, the last symbol of the reference PDCCH is used as the last symbol of the multiple PDCCHs.

[0046] According to a third aspect, a terminal is provided, comprising: a processor, a memory, and a program stored in the memory and executable on the processor, wherein the program implements the steps of the method according to the first aspect when executed by the processor.

[0047] According to a fourth aspect, a readable storage medium is provided, on which a program is stored. When the program is executed by a processor, the steps of the method described in the first aspect are implemented.

[0048] In an embodiment of the present application, for the Multi-TRP PDCCH repetition scenario, the reference PDCCH is determined, which can help define the time reference point, determine the scheduling time of PDSCH / PUSCH / CSI-RS / SRS for this scenario, determine the QCL relationship of PDSCH / CSI-RS, and determine the scheduling timing relationship of PDSCH / PUSCH under multiple HARQ processes, and can support situations where the target PDCCH is not detected. BRIEF DESCRIPTION OF THE DRAWINGS

[0049] Various other advantages and benefits will become apparent to those of ordinary skill in the art by reading the detailed description of the preferred embodiments below. The accompanying drawings are only for the purpose of illustrating the preferred embodiments and are not to be considered as limiting the present application. Also, the same reference symbols are used throughout the accompanying drawings to represent the same components. In the accompanying drawings:

[0050] Figure 1 is a schematic diagram of time slot offset;

[0051] Figure 2a and Figure 2b It is a schematic diagram of orderly scheduling;

[0052] Figure 3 This is one of the schematic diagrams of out-of-order scheduling;

[0053] Figure 4 It is a schematic diagram of the reference point of the starting time of the time slot offset;

[0054] Figure 5 It is a schematic diagram of the QCL relationship of PDSCH or CSI-RS;

[0055] Figure 6 This is the second schematic diagram of out-of-order scheduling;

[0056] Figure 7 A schematic diagram of a wireless communication system applicable to the embodiment of the present application

[0057] Figure 8 is a flowchart of a method for determining a reference PDCCH candidate provided in an embodiment of the present application;

[0058] Fig. 9 is a schematic diagram of a device for determining a reference PDCCH candidate provided in an embodiment of the present application;

[0059] Fig.10 It is a schematic diagram of a terminal provided in an embodiment of the present application. DETAILED DESCRIPTION

[0060] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0061] The term "comprise" and any variation thereof in the specification and claims of the present application are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device comprising a series of steps or units need not be limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices. In addition, the use of "and / or" in the specification and claims to indicate at least one of the connected objects, such as A and / or B, means that A alone, B alone, and A and B exist in three cases.

[0062] In the embodiments of the present application, words such as "exemplary" or "for example" are used to indicate examples, illustrations or descriptions. Any embodiment or design described as "exemplary" or "for example" in the embodiments of the present application should not be interpreted as being more preferred or more advantageous than other embodiments or designs. Specifically, the use of words such as "exemplary" or "for example" is intended to present related concepts in a specific way.

[0063] It is worth noting that the technology described in the embodiments of the present application is not limited to the Long Term Evolution (LTE) / LTE-Advanced (LTE-A) system, but can also be used in other wireless communication systems, such as Code Division Multiple Access (CDMA), Time Division Multiple Access (TDMA), Frequency Division Multiple Access (FDMA), Orthogonal Frequency Division Multiple Access (OFDMA), Single-carrier Frequency Division Multiple Access (SC-FDMA) and other systems. The terms "system" and "network" in the embodiments of the present application are often used interchangeably, and the described technology can be used for the above-mentioned systems and radio technologies as well as other systems and radio technologies. However, the following description describes a new radio (NR) system for example purposes, and NR terms are used in most of the following descriptions, although these technologies can also be applied to applications other than NR system applications, such as the 6th Generation (6G) communication system.

[0064] In order to facilitate understanding of the embodiments of the present application, the following technical points are first introduced below:

[0065] 1. Introduction to slot offset:

[0066] In the related art, in a single transmission point (Single-TRP, STRP) scenario, assuming that the physical downlink control channel (PDCCH) is received at the first time (n), the base station will configure the slot offset (slot offset) for the physical downlink shared channel (PDSCH) / physical uplink shared channel (PUSCH) / channel state information reference signal (CSI-RS) / sounding reference signal (SRS) corresponding to the PDCCH. Then the corresponding PDSCH, PUSCH, CSI-RS, and SRS should be sent at the second time (n+slot offset), see Figure 1 .

[0067] 2. Quasi Co-Location (QCL) Reference Acquisition:

[0068] In the related art, the acquisition of QCL reference requires three steps: Radio Resource Control (RRC) configuration, Medium Access Control-Control Element (MAC-CE) activation, and Downlink Control Information (DCI) indication:

[0069] 1) RRC configures M transmission configuration indication (TCI) states;

[0070] 2) MAC CE selects up to 8 TCI states from M;

[0071] 3) DCI format 1_1 indicates up to 8 states selected from MAC CE, and a terminal (eg, user equipment (UE)) obtains the QCL source signal and type of a received PDSCH demodulation reference signal (DMRS) according to the TCI state.

[0072] If DCI Format 1_1 contains the TCI information field:

[0073] i. If the time interval from the PDCCH reception time to the corresponding PDSCH transmission time is greater than the threshold value (timeDurationForQCL), then the QCL reference is obtained according to the TCI information field in the DCI;

[0074] ii. Otherwise, maintain the same QCL as the CORESET with the lowest ID in the nearest slot containing the control-resource set (CORESET).

[0075] If DCI format 1_1 does not contain the TCI information field, or is scheduled using DCI format 1_0:

[0076] i. If the time interval from the PDCCH reception time to the corresponding PDSCH transmission time is greater than the threshold value (timeDurationForQCL), then the QCL reference is obtained according to the TCI state of the PDCCH that schedules the PDSCH;

[0077] ii. Otherwise, keep the same QCL as the CORESET with the lowest ID in the nearest slot containing the CORESET.

[0078] 3. Out-of-order / in-order scheduling of PDCCH to PDSCH (PDCCH-to-PDSCH) and PDCCH to PUSCH (PDCCH-to-PUSCH).

[0079] (1) In-order scheduling:

[0080] See also Figure 2a and Figure 2b , the Hybrid Automatic RepeatreQuest (HARQ process number) is different: the PDSCH and PUSCH scheduled by the later DCI must be transmitted after the PDSCH and PUSCH scheduled by the earlier DCI;

[0081] The HARQ process number is the same: DCI scheduling PDSCH and PUSCH can be sent only after the previous PDSCH / PUSCH transmission.

[0082] (2) Out-of-order scheduling:

[0083] See also Figure 3, allowing the PUSCH scheduled by the later DCI to be transmitted before the PUSCH scheduled by the earlier DCI, but requiring the two DCIs to belong to two different TRPs.

[0084] 1. Definition of slot offset: Slot offset for scheduling the same PDSCH / PUSCH / CSI-RS / SRS

[0085] See also Figure 4 For the Multi-TRP Ultra-reliable low latency communication (URLLC) scenario, if two TRPs each send a PDCCH to the same user, the DCI they carry is the same, and the slot offset indicated is also the same, but the time when the UE receives these two PDCCH candidates is different, then which time should the UE use as the starting time reference point of the slot offset?

[0086] 2. Determination of the QCL relationship between PDSCH and CSI-RS

[0087] See also Figure 5 , the time interval between the reception time of PDCCH and the reception time of PDSCH / CSI-RS is defined as time offset; in the Multi-TRP scenario, under a fixed threshold value (timeDurationForQCL), if the PDCCH candidates sent by the two TRPs are at different times, the UE uses different PDCCH candidates as the reference point for calculating the time offset, and the determined QCL relationship may also be different.

[0088] 3. Definition of out-of-order / in-order scheduling

[0089] See also Figure 6When a PDCCH contains multiple PDCCH candidates and schedules the same PDSCH / PUSCH, the UE may detect all or part of the PDCCH candidates, so out-of-order scheduling needs to be redefined. The figure shows that only the first candidate is detected in the PDCCH corresponding to PDSCH1 / PUSCH1; only the second candidate is detected in the PDCCH corresponding to PDSCH2 / PUSCH2. Should this situation be considered out-of-order scheduling?

[0090] See also Figure 7 , showing a block diagram of a wireless communication system applicable to the embodiment of the present application. The wireless communication system includes a terminal 71 and a network side device 72. Among them, the terminal 71 can also be called a terminal device or a user terminal (UserEquipment, UE), and the terminal 71 can be a mobile phone, a tablet computer (Tablet Personal Computer), a laptop computer (Laptop Computer) or a notebook computer, a personal digital assistant (Personal Digital Assistant, PDA), a handheld computer, a netbook, an ultra-mobile personal computer (ultra-mobile personal computer, UMPC), a mobile Internet device (Mobile Internet Device, MID), a wearable device (Wearable Device) or a vehicle-mounted device (Vehicle User Equipment, VUE), a pedestrian terminal (Pedestrian User Equipment, PUE) and other terminal side devices, and the wearable device includes: a bracelet, a headset, glasses, etc. It should be noted that the specific type of the terminal 71 is not limited in the embodiment of the present application.

[0091] The network side device 72 can be a base station or a core network, wherein the base station can be referred to as a node B, an evolved node B, an access point, a base transceiver station (Base Transceiver Station, BTS), a radio base station, a radio transceiver, a basic service set (Basic Service Set, BSS), an extended service set (Extended Service Set, ESS), a B node, an evolved B node (eNB), a home B node, a home evolved B node, a WLAN access point, a WiFi node, a transmitting and receiving point (Transmitting Receiving Point, TRP) or some other suitable term in the field. As long as the same technical effect is achieved, the base station is not limited to a specific technical vocabulary. It should be noted that in the embodiment of the present application, only the base station in the NR system is taken as an example, but the specific type of the base station is not limited.

[0092] See also Figure 8 An embodiment of the present application provides a method for determining a reference PDCCH. The execution subject of the method may be a terminal, and the specific steps include: step 801 and step 802.

[0093] Step 801: Detect multiple PDCCHs (or PDCCH candidates);

[0094] Step 802: according to one or more of the reception time of the PDCCH, the ID of the Search Space corresponding to the PDCCH, and the ID of the CORESET corresponding to the PDCCH, one of the multiple PDCCHs is used as a reference PDCCH.

[0095] In one embodiment of the present application, the step of using one of the multiple PDCCHs as a reference PDCCH according to one or more of the reception time of the PDCCH, the ID of the SearchSpace corresponding to the PDCCH, and the ID of the CORESET corresponding to the PDCCH includes:

[0096] Using a first PDCCH among the multiple PDCCHs as a reference PDCCH;

[0097] The first PDCCH satisfies one or more of the following conditions:

[0098] (1) The ID of the Search Space corresponding to the first PDCCH is greater than or less than the ID of the Search Space corresponding to the second PDCCH;

[0099] (2) The ID of the CORESET corresponding to the first PDCCH is greater than or less than the ID of the CORESET corresponding to the second PDCCH;

[0100] (3) the reception time of the first symbol of the first PDCCH is before or after the reception time of the first symbol of the second PDCCH;

[0101] The second PDCCH is another PDCCH among the multiple PDCCHs except the second PDCCH.

[0102] In one embodiment of the present application, the multiple PDCCHs are used to schedule the same one or more of PDSCH, PUSCH, CSI-RS and SRS.

[0103] In one embodiment of the present application, when the ID of the Search Space corresponding to the first PDCCH is greater than or less than the ID of the Search Space corresponding to the second PDCCH, or the ID of the CORESET corresponding to the first PDCCH is greater than or less than the ID of the CORESET corresponding to the second PDCCH, the sending time of the first symbol of the first PDCCH is earlier or later than the sending time of the first symbol of the second PDCCH.

[0104] In one embodiment of the present application, the method further includes:

[0105] Using the reception time of the first symbol of the reference PDCCH as the reference time; or using the sum or difference between the reception time of the first symbol of the second PDCCH and the transmission time intervals of the multiple PDCCHs as the reference time;

[0106] Wherein, when multiple PDCCHs schedule the same PDSCH, PUSCH, CSI-RS or SRS, the reference time and the corresponding transmission time interval of the PDSCH, PUSCH, CSI-RS or SRS are used as the first time offset;

[0107] Alternatively, in the case where multiple PDCCHs schedule the same PDSCH or CSI-RS, the time interval between the reference time and the corresponding PDSCH or CSI-RS is used as the second time offset, and the size relationship between the second time offset and the threshold is used to determine the QCL relationship of the PDSCH or CSI-RS;

[0108] Alternatively, when multiple PDCCHs schedule the same PDSCH or PUSCH, the reference time is used as the reception time of the PDCCH that schedules the PDSCH or PUSCH.

[0109] In one implementation of the present application, when multiple PDCCHs schedule the same PDSCH or PUSCH, the last symbol of the reference PDCCH is used as the last symbol of the multiple PDCCHs.

[0110] In one implementation manner of the present application, a time starting point of the first time offset or the second time offset is equal to a reception time of the reference PDCCH;

[0111] or,

[0112] A time starting point of the first time offset or the second time offset is equal to a sum or difference between a reception time of the reference PDCCH and a transmission time interval of the plurality of PDCCHs.

[0113] In one embodiment of the present application, the transmission time intervals of the multiple PDCCHs are explicitly or implicitly indicated by RRC signaling;

[0114] or,

[0115] The transmission time intervals of the multiple PDCCHs are indicated by DCI.

[0116] In an embodiment of the present application, for the Multi-TRP PDCCH repetition scenario, the reference PDCCH is determined, which can help define the time reference point, determine the scheduling time of PDSCH / PUSCH / CSI-RS / SRS for this scenario, determine the QCL relationship of PDSCH / CSI-RS, and determine the scheduling timing relationship of PDSCH / PUSCH under multiple HARQ processes, and can support situations where the target PDCCH is not detected.

[0117] Embodiment 1: When multiple PDCCHs schedule the same PDSCH, PUSCH, CSI-RS or SRS, the definition of slotoffset needs to determine the following four rules:

[0118] (1) Rule 1:

[0119] It is ensured that among the two associated PDCCH candidates, the PDCCH candidate with the smaller or larger corresponding Search Space ID (or CORESETID) is sent first in the time domain on the corresponding TRP.

[0120] (2) Rule 2:

[0121] The UE uses a PDCCH candidate with an earlier (or later) reception time as a reference PDCCH candidate.

[0122] (3) Rule 3:

[0123] i. If the UE detects all two PDCCH candidates, the UE can obtain the order of their transmission based on the Search Space IDs (or CORESET IDs) of the two PDCCH candidates and Rule 1. The UE then determines the reference PDCCH candidate in combination with Rule 2, and further determines the start time of calculating the slot offset.

[0124] ii. If the UE detects only one of the two PDCCH candidates, the UE can learn whether the PDCCH candidate is earlier or later in the time domain according to the Search Space ID (or CORESET ID) of the PDCCH candidate and Rule 1.

[0125] a) If the PDCCH candidate is earlier in the time domain, and rule 2 defines that the PDCCH candidate earlier in the time domain is used as the reference PDCCH candidate, then the calculation start time of the slot offset = the reception time of the PDCCH candidate;

[0126] b) If the PDCCH candidate is later in the time domain, and Rule 2 defines that the PDCCH candidate that is later in the time domain is used as the reference PDCCH candidate, then the calculation start time of the slot offset = the reception time of the PDCCH candidate;

[0127] c) If the candidate is earlier in the time domain, and rule 2 defines that the PDCCH candidate later in the time domain is used as the reference PDCCH candidate, then the calculation start time of the slot offset = the reception time of the PDCCH candidate + the transmission time interval of 2 PDCCH candidates;

[0128] d) If the PDCCH candidate is later in the time domain, and rule 2 defines that the PDCCH candidate earlier in the time domain is used as the reference PDCCH candidate, then the calculation start time of the slot offset = the reception time of the PDCCH candidate - the time interval between the transmissions of the two PDCCH candidates;

[0129] (4) Rule 4:

[0130] The transmission time interval between the two candidates may be explicitly configured by RRC or implicitly determined according to the RRC configuration or indicated by DCI.

[0131] Embodiment 2: When multiple PDCCHs schedule the same PDSCH / CSI-RS, the QCL relationship of PDSCH / CSI-RS is determined by the following four rules:

[0132] (1) Rule 1:

[0133] It is ensured that among the two associated PDCCH candidates, the PDCCH candidate with the smaller or larger corresponding Search Space ID (or CORESETID) is sent first in the time domain on the corresponding TRP.

[0134] (2) Rule 2:

[0135] The UE uses a PDCCH candidate with a later reception time as a reference PDCCH candidate.

[0136] (3) Rule 3:

[0137] i. If the UE detects all two PDCCH candidates, the UE can obtain the order of their transmission based on the Search Space ID (or CORESET ID) of the two PDCCH candidates and Rule 1. Then, the UE uses Rule 2 to take the PDCCH candidate with the later reception time as the reference PDCCH candidate, and then takes the reception time of the reference PDCCH candidate as the calculation start time of the time offset.

[0138] ii. If the UE detects only one of the two PDCCH candidates, the UE can learn whether the PDCCH candidate is earlier or later in the time domain according to the Search Space ID (or CORESET ID) of the PDCCH candidate and Rule 1.

[0139] a) If the PDCCH candidate is later in the time domain, then the calculation start time of the time offset = the reception time of the PDCCH candidate.

[0140] b) If the PDCCH candidate is earlier in the time domain, then the calculation start time of the time offset = the reception time of the PDCCH candidate + the sending time interval of 2 PDCCH candidates.

[0141] (4) Rule 4:

[0142] The time interval for sending two PDCCH candidates may be explicitly configured by RRC or implicitly determined according to RRC configuration or indicated by DCI.

[0143] Embodiment 3: When multiple PDCCHs schedule the same PDSCH or PUSCH, the definition of out-of-order / in-order scheduling determines the following four rules:

[0144] (1) Rule 1:

[0145] It is ensured that among the two associated PDCCH candidates, the PDCCH candidate with the smaller or larger corresponding Search Space ID (or CORESETID) is sent first in the time domain on the corresponding TRP.

[0146] (2) Rule 2:

[0147] The UE uses a PDCCH candidate with a later reception time as a reference PDCCH candidate.

[0148] (3) Rule 3:

[0149] i. If the UE detects all two PDCCH candidates, the UE can obtain the order of their transmission based on the Search Space ID (or CORESET ID) of the two PDCCH candidates and Rule 1. Then, the UE uses Rule 2 to take the PDCCH candidate with the later reception time as the reference PDCCH candidate, and then takes the reception time of the reference PDCCH candidate as the reception time of the PDCCH that schedules the corresponding PDSCH or PUSCH.

[0150] ii. If the UE detects only one of the two PDCCH candidates, the UE can learn whether the PDCCH candidate is earlier or later in the time domain according to the Search Space ID (or CORESET ID) of the PDCCH candidate and Rule 1.

[0151] a) If the PDCCH candidate is later in the time domain, then the PDCCH reception time = the PDCCH candidate reception time.

[0152] b) If the PDCCH candidate is earlier in the time domain, then the PDCCH reception time = the reception time of the PDCCH candidate + the transmission time interval of 2 PDCCH candidates

[0153] (4) Rule 4:

[0154] The time interval for sending two PDCCH candidates may be explicitly configured by RRC or implicitly determined according to RRC configuration or indicated by DCI.

[0155] In an embodiment of the present application, for the Multi-TRP PDCCH repetition scenario, the reference PDCCH is determined, which can help define the time reference point, determine the scheduling time of PDSCH / PUSCH / CSI-RS / SRS for this scenario, determine the QCL relationship of PDSCH / CSI-RS, and determine the scheduling timing relationship of PDSCH / PUSCH under multiple HARQ processes, and can support situations where the target PDCCH is not detected.

[0156] See also Fig. 9 The embodiment of the present application provides a device for determining a reference PDCCH, the device being applied to a terminal, including:

[0157] A detection module 901, configured to detect multiple PDCCHs;

[0158] The determination module 902 is used to use one of the multiple PDCCHs as a reference PDCCH according to one or more of the reception time of the PDCCH, the ID of the Search Space corresponding to the PDCCH, and the ID of the CORESET corresponding to the PDCCH.

[0159] In one implementation manner of the present application, the determining module 902 is further configured to: use a first PDCCH among the multiple PDCCHs as a reference PDCCH;

[0160] The first PDCCH satisfies one or more of the following conditions:

[0161] (1) The ID of the Search Space corresponding to the first PDCCH is greater than or less than the ID of the Search Space corresponding to the second PDCCH;

[0162] (2) The ID of the CORESET corresponding to the first PDCCH is greater than or less than the ID of the CORESET corresponding to the second PDCCH;

[0163] (3) the reception time of the first symbol of the first PDCCH is before or after the reception time of the first symbol of the second PDCCH;

[0164] The second PDCCH is another PDCCH among the multiple PDCCHs except the second PDCCH.

[0165] In one embodiment of the present application, the multiple PDCCHs are used to schedule the same one or more of PDSCH, PUSCH, CSI-RS and SRS.

[0166] In one embodiment of the present application, when the ID of the Search Space corresponding to the first PDCCH is greater than or less than the ID of the Search Space corresponding to the second PDCCH, or the ID of the CORESET corresponding to the first PDCCH is greater than or less than the ID of the CORESET corresponding to the second PDCCH, the sending time of the first symbol of the first PDCCH is earlier or later than the sending time of the first symbol of the second PDCCH.

[0167] In one embodiment of the present application, the determination module 902 is further configured to: use the reception time of the first symbol of the reference PDCCH as the reference time; or use the reception time of the first symbol of the second PDCCH and the sum or difference of the transmission time intervals of the multiple PDCCHs as the reference time;

[0168] Wherein, when multiple PDCCHs schedule the same PDSCH, PUSCH, CSI-RS or SRS, the reference time and the corresponding transmission time interval of the PDSCH, PUSCH, CSI-RS or SRS are used as the first time offset;

[0169] Alternatively, in the case where multiple PDCCHs schedule the same PDSCH or CSI-RS, the time interval between the reference time and the corresponding PDSCH or CSI-RS is used as the second time offset, and the size relationship between the second time offset and the threshold is used to determine the QCL relationship of the PDSCH or CSI-RS;

[0170] Alternatively, when multiple PDCCHs schedule the same PDSCH or PUSCH, the reference time is used as the reception time of the PDCCH that schedules the PDSCH or PUSCH.

[0171] In one implementation of the present application, when multiple PDCCHs schedule the same PDSCH or PUSCH, the last symbol of the reference PDCCH is used as the last symbol of the multiple PDCCHs.

[0172] In one implementation manner of the present application, a time starting point of the first time offset or the second time offset is equal to a reception time of the reference PDCCH;

[0173] or,

[0174] A time starting point of the first time offset or the second time offset is equal to a sum or difference between a reception time of the reference PDCCH and a transmission time interval of the plurality of PDCCHs.

[0175] In one embodiment of the present application, the transmission time intervals of the multiple PDCCHs are explicitly or implicitly indicated by RRC signaling;

[0176] or,

[0177] The transmission time intervals of the multiple PDCCHs are indicated by DCI.

[0178] The device provided in the embodiment of the present application can achieve Figure 8 The various processes implemented by the method embodiment shown achieve the same technical effect and will not be described again here to avoid repetition.

[0179] Fig.10To implement a hardware structure diagram of a terminal in an embodiment of the present application, the terminal 1000 includes but is not limited to: a radio frequency unit 1001, a network module 1002, an audio output unit 1003, an input unit 1004, a sensor 1005, a display unit 1006, a user input unit 1007, an interface unit 1008, a memory 1009, and a processor 1010 and other components.

[0180] Those skilled in the art will appreciate that the terminal 1000 may also include a power source (such as a battery) for supplying power to various components, and the power source may be logically connected to the processor 1010 through a power management system, thereby implementing functions such as managing charging, discharging, and power consumption management through the power management system. Fig.10 The terminal structure shown in the figure does not constitute a limitation on the terminal. The terminal may include more or fewer components than shown in the figure, or combine certain components, or arrange the components differently, which will not be described in detail here.

[0181] It should be understood that in the embodiment of the present application, the input unit 1004 may include a graphics processor (Graphics Processing Unit, GPU) 10041 and a microphone 10042, and the graphics processor 10041 processes the image data of the static picture or video obtained by the image capture device (such as a camera) in the video capture mode or the image capture mode. The display unit 1006 may include a display panel 10061, and the display panel 10061 may be configured in the form of a liquid crystal display, an organic light emitting diode, etc. The user input unit 1007 includes a touch panel 10071 and other input devices 10072. The touch panel 10071 is also called a touch screen. The touch panel 10071 may include two parts: a touch detection device and a touch controller. Other input devices 10072 may include, but are not limited to, a physical keyboard, function keys (such as volume control keys, switch keys, etc.), a trackball, a mouse, and a joystick, which will not be repeated here.

[0182] In the embodiment of the present application, the radio frequency unit 1001 receives downlink data from the network side device and sends it to the processor 1010 for processing; in addition, the uplink data is sent to the network side device. Generally, the radio frequency unit 1001 includes but is not limited to an antenna, at least one amplifier, a transceiver, a coupler, a low noise amplifier, a duplexer, etc.

[0183] The memory 1009 can be used to store software programs or instructions and various data. The memory 1009 can mainly include a program or instruction storage area and a data storage area, wherein the program or instruction storage area can store an operating system, an application program or instruction required for at least one function (such as a sound playback function, an image playback function, etc.), etc. In addition, the memory 1009 can include a high-speed random access memory, and can also include a non-volatile memory, wherein the non-volatile memory can be a read-only memory (Read-Only Memory, ROM), a programmable read-only memory (Programmable ROM, PROM), an erasable programmable read-only memory (Erasable PROM, EPROM), an electrically erasable programmable read-only memory (Electrically EPROM, EEPROM) or a flash memory. For example, at least one disk storage device, a flash memory device, or other non-volatile solid-state storage devices.

[0184] The processor 1010 may include one or more processing units; optionally, the processor 1010 may integrate an application processor and a modem processor, wherein the application processor mainly processes an operating system, a user interface, and application programs or instructions, etc., and the modem processor mainly processes wireless communications, such as a baseband processor. It is understandable that the modem processor may not be integrated into the processor 1010.

[0185] The terminal provided in the embodiment of the present application can achieve Figure 8 The various processes implemented by the method embodiment shown achieve the same technical effect and will not be described again here to avoid repetition.

[0186] The embodiment of the present application also provides a readable storage medium on which a program or instruction is stored. When the program or instruction is executed by a processor, the above Figure 8 The various processes of the method embodiment shown can achieve the same technical effect, and will not be described again here to avoid repetition.

[0187] The processor is the processor in the terminal described in the above embodiment. The readable storage medium includes a computer readable storage medium, such as a computer read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk.

[0188] The steps of the method or algorithm described in conjunction with the contents disclosed in this application can be implemented in hardware or by executing software instructions in a processor. The software instructions can be composed of corresponding software modules, and the software modules can be stored in RAM, flash memory, ROM, EPROM, EEPROM, registers, hard disks, mobile hard disks, read-only optical disks, or any other form of storage medium known in the art. An exemplary storage medium is coupled to the processor so that the processor can read information from the storage medium and write information to the storage medium. Of course, the storage medium can also be a component of the processor. The processor and the storage medium can be carried in an ASIC. In addition, the ASIC can be carried in a core network interface device. Of course, the processor and the storage medium can also exist in the core network interface device as discrete components.

[0189] Those skilled in the art should be aware that in one or more of the above examples, the functions described in this application can be implemented using hardware, software, firmware, or any combination thereof. When implemented using software, these functions can be stored in a computer-readable medium or transmitted as one or more instructions or codes on a computer-readable medium. Computer-readable media include computer storage media and communication media, wherein communication media include any media that facilitates the transmission of a computer program from one place to another. Storage media can be any available media that a general or special-purpose computer can access.

[0190] The specific implementation methods described above further illustrate the purpose, technical solutions and beneficial effects of the present application in detail. It should be understood that the above description is only the specific implementation methods of the present application and is not intended to limit the scope of protection of the present application. Any modifications, equivalent substitutions, improvements, etc. made on the basis of the technical solutions of the present application should be included in the scope of protection of the present application.

[0191] Those skilled in the art will appreciate that the embodiments of the present application may be provided as methods, systems, or computer program products. Therefore, the embodiments of the present application may adopt the form of complete hardware embodiments, complete software embodiments, or embodiments in combination with software and hardware. Moreover, the embodiments of the present application may adopt the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) that contain computer-usable program code.

[0192] The embodiments of the present application are described with reference to the flowcharts and / or block diagrams of the methods, devices (systems), and computer program products according to the embodiments of the present application. It should be understood that each process and / or box in the flowchart and / or block diagram, as well as the combination of the processes and / or boxes in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to generate a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowchart and / or block diagram. Figure 1 A process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0193] These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing device to operate in a specific manner, so that the instructions stored in the computer-readable memory produce an article of manufacture comprising an instruction device, which implements the process Figure 1 A process or multiple processes and / or boxes Figure 1 A function specified in one or more boxes.

[0194] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operating steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing instructions for implementing the process. Figure 1 A process or multiple processes and / or boxes Figure 1 The steps for the functions specified in one or more boxes.

[0195] Obviously, those skilled in the art can make various changes and modifications to the embodiments of the present application without departing from the spirit and scope of the present application. Thus, if these modifications and variations of the embodiments of the present application fall within the scope of the claims of the present application and their equivalents, the present application is also intended to include these modifications and variations.

Claims

1. A method for determining a reference PDCCH, applied to a terminal, characterized in that: include: Detect multiple PDCCHs; According to one or more of a reception time of the PDCCH, an ID of a Search Space corresponding to the PDCCH, and an ID of a CORESET corresponding to the PDCCH, a first PDCCH among the multiple PDCCHs is used as a reference PDCCH; The method further comprises: Taking the sum or difference between the reception time of the first symbol of the second PDCCH and the transmission time intervals of the plurality of PDCCHs as the reference time, wherein the second PDCCH is another PDCCH among the plurality of PDCCHs except the first PDCCH; Wherein, when multiple PDCCHs schedule the same PDSCH, PUSCH, CSI-RS or SRS, the reference time and the corresponding transmission time interval of the PDSCH, PUSCH, CSI-RS or SRS are used as the first time offset; Alternatively, in the case where multiple PDCCHs schedule the same PDSCH or CSI-RS, the time interval between the reference time and the corresponding PDSCH or CSI-RS is used as the second time offset, and the size relationship between the second time offset and the threshold is used to determine the QCL relationship of the PDSCH or CSI-RS; Alternatively, in the case where multiple PDCCHs schedule the same PDSCH or PUSCH, the reference time is used as the reception time of the PDCCH that schedules the PDSCH or PUSCH; A time starting point of the first time offset or the second time offset is equal to a reception time of the reference PDCCH; or, A time starting point of the first time offset or the second time offset is equal to a sum or a difference between a reception time of the reference PDCCH and a transmission time interval of the plurality of PDCCHs.

2. The method according to claim 1, characterized in that The first PDCCH satisfies one or more of the following: The ID of the Search Space corresponding to the first PDCCH is greater than or less than the ID of the Search Space corresponding to the second PDCCH; The ID of the CORESET corresponding to the first PDCCH is greater than or less than the ID of the CORESET corresponding to the second PDCCH; The reception time of the first symbol of the first PDCCH is before or after the reception time of the first symbol of the second PDCCH; The second PDCCH is another PDCCH among the multiple PDCCHs except the first PDCCH.

3. The method according to claim 1, characterized in that The multiple PDCCHs are used to schedule the same one or more of the PDSCH, PUSCH, CSI-RS and SRS.

4. The method according to claim 2, characterized in that: When the ID of the Search Space corresponding to the first PDCCH is greater than or less than the ID of the Search Space corresponding to the second PDCCH, or the ID of the CORESET corresponding to the first PDCCH is greater than or less than the ID of the CORESET corresponding to the second PDCCH candidate, the sending time of the first symbol of the first PDCCH is earlier or later than the sending time of the first symbol of the second PDCCH.

5. The method according to claim 1, characterized in that In the case that multiple PDCCHs schedule the same PDSCH or PUSCH, the last symbol of the reference PDCCH is used as the last symbol of the multiple PDCCHs.

6. The method according to claim 1, characterized in that The transmission time intervals of the multiple PDCCHs are explicitly or implicitly indicated by RRC signaling; or, The transmission time intervals of the multiple PDCCHs are indicated by DCI.

7. A device for determining a reference PDCCH, applied to a terminal, characterized in that: include: A detection module, used for detecting multiple PDCCHs; A determination module, configured to use a first PDCCH among the multiple PDCCHs as a reference PDCCH according to one or more of a reception time of the PDCCH, an ID of a Search Space corresponding to the PDCCH, and an ID of a CORESET corresponding to the PDCCH; The determining module is further configured to: use the sum or difference between the reception time of the first symbol of the second PDCCH and the transmission time intervals of the plurality of PDCCHs as a reference time; Wherein, when multiple PDCCHs schedule the same PDSCH, PUSCH, CSI-RS or SRS, the reference time and the corresponding transmission time interval of the PDSCH, PUSCH, CSI-RS or SRS are used as the first time offset; Alternatively, in the case where multiple PDCCHs schedule the same PDSCH or CSI-RS, the time interval between the reference time and the corresponding PDSCH or CSI-RS is used as the second time offset, and the size relationship between the second time offset and the threshold is used to determine the QCL relationship of the PDSCH or CSI-RS; Alternatively, in the case where multiple PDCCHs schedule the same PDSCH or PUSCH, the reference time is used as the reception time of the PDCCH that schedules the PDSCH or PUSCH; A time starting point of the first time offset or the second time offset is equal to a reception time of the reference PDCCH; or, A time starting point of the first time offset or the second time offset is equal to a sum or a difference between a reception time of the reference PDCCH and a transmission time interval of the plurality of PDCCHs.

8. The device according to claim 7, characterized in that The first PDCCH satisfies one or more of the following: The ID of the Search Space corresponding to the first PDCCH is greater than or less than the ID of the Search Space corresponding to the second PDCCH; The ID of the CORESET corresponding to the first PDCCH is greater than or less than the ID of the CORESET corresponding to the second PDCCH; The reception time of the first symbol of the first PDCCH is before or after the reception time of the first symbol of the second PDCCH; The second PDCCH is another PDCCH among the multiple PDCCHs except the second PDCCH.

9. The device according to claim 7, characterized in that The multiple PDCCHs are used to schedule the same one or more of the PDSCH, PUSCH, CSI-RS and SRS.

10. The device according to claim 7, characterized in that When the ID of the Search Space corresponding to the first PDCCH is greater than or less than the ID of the Search Space corresponding to the second PDCCH, or the ID of the CORESET corresponding to the first PDCCH is greater than or less than the ID of the CORESET corresponding to the second PDCCH, the sending time of the first symbol of the first PDCCH is earlier or later than the sending time of the first symbol of the second PDCCH.

11. The device according to claim 7, characterized in that In the case that multiple PDCCHs schedule the same PDSCH or PUSCH, the last symbol of the reference PDCCH is used as the last symbol of the multiple PDCCHs.

12. A terminal, characterized in that: include: A processor, a memory, and a program stored in the memory and executable on the processor, wherein when the program is executed by the processor, the steps of the method according to any one of claims 1 to 6 are implemented.

13. A readable storage medium, characterized in that: The readable storage medium stores a program, and when the program is executed by a processor, the steps of the method according to any one of claims 1 to 6 are implemented.

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